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I am working with a regular expression in PHP. I have the following string:
<img src="/files/admin/hotel_website.gif" alt="Go To The Hotel's Web Site" align="absmiddle" border="0" class="hotel_icon" /> This string contains carriage return and line feed characters.
I want my regular expression to replace html img tags with IMG but this does not work with the above text.
I discovered it contained these characters by looping through each character in the string and printing out the hexadecimal representation which can be found here (http://pastebin.com/ViNdBsRV).
Here is my regular expression:
strip_tags(preg_replace('/^\s*<img\s*.*\/?>\s*$/i', '[IMG]', $test)); Appreciate the help.
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To match a character having special meaning in regex, you need to use a escape sequence prefix with a backslash ( \ ). E.g., \. matches "." ; regex \+ matches "+" ; and regex \( matches "(" . You also need to use regex \\ to match "\" (back-slash).
[] denotes a character class. () denotes a capturing group. [a-z0-9] -- One character that is in the range of a-z OR 0-9.
\n. Matches a newline character. \r. Matches a carriage return character.
\s stands for “whitespace character”. Again, which characters this actually includes, depends on the regex flavor. In all flavors discussed in this tutorial, it includes [ \t\r\n\f]. That is: \s matches a space, a tab, a carriage return, a line feed, or a form feed.
[\n\r]+ Will match new lines. For White spaces add [\n\r\s]+
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